The longest passenger plane in the world is the Boeing 747-8I. It is 76.3m (250ft) long.
More than 1.5 million seeds of various plants from around the world are stored at the Svalbard global seed vault in Norway. To ensure the safety of the seeds, it was built inside a tunnel carved under a mountain.
Each main cable in San Francisco's Golden Gate Bridge is made of 27,572 individual thinner wires. It took 80,000 miles (128,748km) of wire to make up each cable, which has a final diameter of 36.3 inches (92.4cm).